Shaft-coupling.



Patented Aug. I9, |902. "R. W. SCOTT.

SHAFT COUPLING.

(Application filed June 28, 1902.) CNO Model.)

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ROBERT W. SCOTT, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TOLOUIS N. I). VILLIAMS, OF ASI-IBOURNE, PENNSYL- VANIA.

SHAFT-COUPLING.

SPECIFICATION forming part of Letters Patent No. 707,453, dated August19, 1902.

Application filed June 23, 1902l Serial 110.112,912. (No model.)

T0 LZZ whom it may con/007%:

Beit known that I, ROBERT WV. SCOTT, a citizen of the United States,residing in Philadelphia, Pennsylvania, haveinvented certainImprovements in Shaft-Couplings, of which the following is aspecification.

My invention relates to that class of shaftcouplings which comprise asplit sleeveencircling the meeting ends of the shafts to be coupled andprovided with means for compressing said sleeve upon the shafts, theobject of my invention being toso construct such a coupling as toprovide for a better frictional hold of the sleeve upon the shafts thanis possible with previous couplings of this type with which I amfamiliar. This object I attain in the manner hereinafter set forth,reference being had to the accompanying drawings, in which-- Figure l isa View, partly in elevation and partly in longitudinal section, of ashaft-coupling constructed in accordance with my invention; and Fig. 2is a side elevation of another form of coupling embodying the invention.

In Fig. 1 of the drawings, l l represent the meeting ends of a pair ofshafts which have to be coupled, and 2 is a couplingsleeve whichencircles said meeting ends of the shafts and presents an exteriorsurface of double-cone formation, the bases of the cones or portion ofgreatest diameter of the sleeve being at the center of the same.'

Surrounding the sleeve 2 are a pairof compression-cones 3, which maybeprovided with any ordinary means for drawing or forcing them together,the means shown in the present instance being bolts ,which pass throughopenings in anges on the cones and have heads bearing upon the flange ofone cone and nuts bearing upon the flange of the other cone.

The coupling-sleeve 2 has formed in it a spiral slot, which may form anydesired number of convolutions, but which at least substantiallyencircles the shaft, so that when radial compression is exerted upon thesleeve by the compression-cones said sleeve will be tightened upon theshafts uniformly throughout its entire length and a firm and uniformgrip of all portions of the sleeve upon said shaft will result, wherebya much better hold of the coupling is insured than in couplings of thatclass in which the sleeve is split in a longitudinal or substantiallylongitudinal direction and in which the movement of the parts of thesleeve from and toward the shaft resembles movement upon a hinge orpivot instead of a vuniform movement throughout all parts of theclamping-surface. The pitch of the spiral slot is by preference alwayssuch that the frictional hold of the rotating shaft upon the sleevetends to tighten the same.

The coupling-sleeve shown in Fig. l has an uninterrupted longitudinalportion between `the ends of the slot, in which portion a keyseat 5 canbe formed, so as to provide a firm bearing for such key.

In' that form of my improved coupling shown in Fig. 2 thecompression-cones are dispensed with and compressing screws or bolts 6are employed, these screws or bolts passing through openings formed inthe sleeve and having bearing on shouldered portions of the sleeve onopposite sides of the slot, the openings being slightly larger than thebolts to permit of movement or creep of one portion of the sleeve inrespect to the other as the slot is expanded or contracted.

My invention relates to couplings of the compression type and isdistinct from those of the torsional type, which consist of a strip orband coiled around a shaft or shafts and l tightened upon the same byreversely moving 3. A shaft-coupling consisting of a sleeve In testimonywhereof I have signed my having therein a spiral slot substantiallyenname to this specification in the presence of i circling lche same andhaving between the two subscribing Witnesses. i endsofsaidslotasubstantiaiiyuninterrupted ROBERT W. SCOTT. i

5 longitudinal portion with key-seat formed Witnesses:

therein, in combination with means for com- F. E. BECHTOLD,

pressing the s1eeve,substan1sia11y as specified. JOS. H. KLEIN.

